131527787217 has 16 divisors (see below), whose sum is σ = 177274822080. Its totient is φ = 86737496832.

The previous prime is 131527787201. The next prime is 131527787249. The reversal of 131527787217 is 712787725131.

It is not a de Polignac number, because 131527787217 - 2⁴ = 131527787201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131527787217.

It is not an unprimeable number, because it can be changed into a prime (131527787267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 449092 + ... + 681717.

It is an arithmetic number, because the mean of its divisors is an integer number (11079676380).

Almost surely, 2^131527787217 is an apocalyptic number.

It is an amenable number.

131527787217 is a deficient number, since it is larger than the sum of its proper divisors (45747034863).

131527787217 is a wasteful number, since it uses less digits than its factorization.

131527787217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131232.

The product of its digits is 1152480, while the sum is 51.

The spelling of 131527787217 in words is "one hundred thirty-one billion, five hundred twenty-seven million, seven hundred eighty-seven thousand, two hundred seventeen".